Rope clamp



Patented Oct. 26, 1926.

UITED STATES OSCAR ANDERSON, OF JERSEY CITY, NEW JERSEY.

ROPE CLAMP.

Application tiled May 1S,

This invention relates to rope clamps more particularly adapted forsecuring wire ropes or cables such as used with hoisting machines, etc.

An object of the invention is to provide a rope clamp which iscomparatively simple and is adapted to hold a rope or cable securely andreliably at all times when the parts are properly adjusted; that is tosay, the rope clamp is preferably so constructed that from time to time,as the holding action of the clamping parts may become weaker, theadjusting of the clamping parts may be made so as to more strongly holdthe rope or cable, the clamp being preferably specially constructed withthat end in view.

These being among the objects of the present invention, the sameconsists of certain features of construction and combinations of partsto be hereinafter described and then claimed with reference to theaccompanying drawings illustrating the preferred embodiment of theinvention, in which:

Figure 1 is a plan of the improved clamp;

Figure 2 is a side elevation;

tigure 8 is a longitudinal section on the line 3-3 Figure 1;

Figure a is a plan of the shank and head of the clamp stripped of allmovable parts; and

Figures 5 and 6, respectively, are transverse sections on the lines 5-5and 6-6 Figure 1.

1ileferring to the drawings, the main body of the clamp comprises ashank provided at one end with a suitable connecting member which membermay be in the form of a head 11 which is preferably forked, and throughthe fork there passes a bolt 12 over which, or over a sheave thereonthere may pass a rope which is to do lthe pulling or raising. The ropeor cable 13 is adapted to be operated by a hoisting machine or the like,and the main object of the clamp is to securethe rope 13 firmly thereto.

The shank 10 is provided with a raised portion 14 which is locatedintermediately of the normally dimensioned portions of the shank, so asto project outwardly from one face of the shank. A depression 15longitudinally of the shank is formed in the raised portion 14, suchdepression being of generally V-shape in cross-section, so that theopposite walls of the depression diverge outwardly. The side walls ofthe longitudi- 1926. Serial No. 110,034.

nal depression 15 are provided with two series of teeth 16, 17, eachseries extending longitudinally of the depression, and the biting edgesof the teeth extending outr teeth may or may not extend the full depthof the depression 15, and preferably they extend from a point slightlyabove the bottom of the depression and taper inwardly from theirouterends towards the bottom of the depression.

A pair of holes 18 is formed through the extremity of the shank 10, andanother pair of holes 19 is formed in the shank at a point between theraised portion 14 and the head 11, that is to say, said holes 18, 19 areformed through the thinner portions of the shank. Another pair of holes2O is formed in the shank at a point about midway of the two pair ofholes 18, 19, the holes Q0 passing throu h the raised portion 14 of theshank, and tiose portions of the holes which pass through said raisedportion being open to the depression 15. It will be seen that the holes20 are in a plane intersecting the two series of teeth 16, 17, so thatthere is one hole at the same side of the depression as the series ofteeth 16 and another hole 20 at the same side as the series of teeth 17.

Clamping bolts 21, 22, 23 are passed through the holes in the shank, andpreferably these bolts are of U-shape, the free ends thereof havingthreads 211 onto which may be turned nuts 25. U-bolt 21. is passedthrough the pair of holes 1S', and U-bolt 522 is passed through the pairof holes 19, these two bolts 21, 22 Abeing located beyond the ends ofthe raised portion 111. U-bolt 223, which is passedthrough the holes 20,islocated about midway between the two bolts 21, 22. The bottom of the'longitudinal depression is formed with rounded humps 26, 27, the hump 26being located between the bolts 21, 23, and the hump 27 between thebolts 22, 23.

In using the clamp to anchor a rope or cable 13 thereto,the end of thecable is passed between the opposite side portions of lill) vso lli

engaged by thebolts'will be forced :as tai" It will be seen that whenthelUfloolts are( drawn in as tar as possible, the portions of the ropeoricable between the' bolts will-be 'caused .to be:forciblypiessedfagainst the biting edges of the twd series o-teeth, 16,y17,

. and vas :the teeth .are Vlocated inthe spaces between the bolts,thebolts-will have a tendency to .pulhthe interinediate. portions of therope or'cable'inore closely towards the shank l0, `therebymore or:lesskinking the rope so thatthe rope is firmly heldA by thebulldog-likefgripping action o'l the teeth and cannot slip. 'Theratchettooth-like torniation of the, teeth'and the positioning of thebiting edges thereof towards the head 11 of they shank tend to holdl therope the more se curely the greater the pull on the rope. It

is clear that asthe end of the rope to be `gripped wears more or less,or may have a tendency to becoine loose, the bolts may be as to forcethe rope fuither'intothe longitudinal toothed depression 15, `and as thedepression is o'V-shape the rope willstill be held'tirnily and securelyby the tightened up'bolts. It the rope or cable .be of' smallerIdiameter to startA with than is illustrated in;

the drawings, or if a: rope'of the. size shown becoines so worn andgrooved' thatvfit; has to be still further.tightenediupit will be seenthat the rope will eventually be brought to bear uponv t-he humps26, 27.jThese fhuinps 26,' 27 formed in' theV bottin' of' the depression 15will produce. a more @or less decided lrinlring of the rope or Cable18because those' portions of'fthe rope whichV are as possible towardstheshanlz 10,'while'the (ill intermediate kinked portions of the rope;will be slightlyelevated overitheV engaging vsurfaces ofsaidhumps,'fandythereby these liu-inps together with the 'clampingVaction o' the bolts will iirinlyan'd 'securely hold the rope.

y1. `In a rope clainp, the combination of a clamping shank having aheadand provided ,A v. Y 'n ,cv -,:-1- .1, with a'longitudinal depressionfor receivinga rope, a series of teeth at each :defbfthe Itis obviousthat the invention is `sus-tV 'p ceptibleto more 'or less modificationand depression andfeachtooth extending Ver- Utically thereof, the teethbeing of ratchettooth shapemand/ their short sides presented towardo'iieend 'of the Yhead end ot' the de-A `pression, threaded U-shaped,rope clamping "bolts passing through the shank for spanning' the rope,`at the sides ot the depression` and nuts screiif'edonto the bolts, atthe bach ot'- the shank.l

2. ln a;rope clamp, the combination ot a clin'npin shank having a head,`and provided with a longitudinal depression for receiving' a rope. aseries oi teeth at each side ot the (repression, three U-shaped,threaded, repeclainping bolts ,passing through the shank for spanningythe iope,jat`the sides of the '.ilepression,L the inteiiiiediateboltvintersectthe twoseiies ot teeth, and the end bolts "ng located beyondthe ends of the depression. and nuts screwed onto the bolts, at the backof the' shank.

B. ln a 'rope clainp, the combination of a clamping' shank having aconnecting` iineinbei' and provided :with a longitudinal depressionl forreceiving a rope, a series ot l y teeth ateach side` o'ti thedepression, three freely tightened up firmly upon the rope so U-shaped,threaded, rope-clanipingvbolts vpassing` through the shank for spanning`the tudinal depression for, receiving?,- la rope,

series' of yteeth v at nach VVside of the depression and each toothextending verticali;Y thereof` the teeth being ot ratchet-tooth shapeand their shortsides presented toward Vrthat end :of thedeprje'ssionbeyondzwhich said connectinggineniber' is located, threaded ropeAclainpinnfbolts-ipassing through the shank"` at the sidesiof thedepression, and' nutsy screwed onto the bolts. l v i 'A Y i '5.\ In; a'rope-clamp, the, combination of a clamping shankhaving a connecting"inem* b ei1 at'one end and provided with a longitudinal depression' forreceiving 1 a rope,r a series ofjteeth attach sidevofthe 'depression,three threaded rope clamping boltsv fpassing through the shanlr'at the*l sides of "the depression,r theinterinediatebolt inter secting ,thetwo kseries Y of teeth andthe fend bolts'lbeingilocatedbeyond theendszoi' the depression, and nuts screwed onto thebolts.

i OSCAR ANDERSGN.

